Use of springcloud-----fuse Hystrix

1. Resttemplate+ribbon using Hystrix

1.1 Introducing Dependencies

<!---<dependency>    <GroupId  >org.springframework.cloud</groupId>    <  artifactid>spring-cloud-starter-hystrix</artifactid > </ Dependency >

1.2 Adding annotations on methods that require fusing

@Service Public classHiservice {@Autowired resttemplate resttemplate; //a way to fuse@HystrixCommand (fallbackmethod= "Hierror")//method of execution after fusing     PublicString Sayhi () {returnResttemplate.getforobject ("Http://SERVICE-HI/info", String.class); }        //method of execution after fusing     PublicString Hierror () {return"Sorry hi Error"; }}

1.3 Declaring the use of Hystrix in the startup class

@SpringBootApplication @enablediscoveryclient//Register with the service center@RestController @enablehystrix//enabling the fusing mechanism Public classConsumerribbon {@AutowiredPrivateHiservice Hiservice;  Public Static voidMain (string[] args) {Springapplication.run (Consumerribbon.class, args); } @Bean @LoadBalanced//Use this resttemplate to turn on load balancingresttemplate initresttemplate () {return Newresttemplate (); } @RequestMapping ("Info")     Publicstring Hiconsumer () {string response=Hiservice.sayhi (); returnresponse; }}

1.4 Start Registry and Cloud-consumer-ribbon, Access http://localhost:8764/info return sorry hi error

Start Service-hi, access Http://localhost:8764/info return Hello Eureka client 8762

2 Feign using Hystrix

2.1 Feign comes with a fuse, no need to import hystrix dependencies, but need to import the following dependencies, otherwise return java.lang.noclassdeffounderror:com/netflix/hystrix/contrib/ Javanica/aop/aspectj/hystrixcommandaspect Error

< Dependency >    < groupId >com.netflix.hystrix</groupId>    <  Artifactid>hystrix-javanica</artifactid></  dependency>

2.2 Hystrix is enabled in the configuration file, which is turned off by default

Feign:  hystrix:   enabled:true

2.3 Specify the class to be executed after the fuse

@FeignClient (value= "Service-hi", Fallback=hiservicehystric.  Class)// specifies which service provider to invoke, specifies the type of execution after the fuse interface  ihiservice {        @ Requestmapping (Value= "/info", Method=requestmethod.get)// specifies which interface to invoke the service provider     String info ();        @RequestMapping (Value= "/info", Method=requestmethod.get)// Specifies which interface     to invoke the service provider String hi ();}

2.4 Specify the corresponding method after fusing

@Component  Public class Implements Ihiservice {    // fused after executing the appropriate method public      String info () {          return "Sorry info feign";    }      Public String hi () {        return "Sorry hi feign";    }}

2.5 Declaring the startup Hystrix in the Startup class

@EnableHystrix

2.6 Start Registry and cloud-consumer-feign, Access http://localhost:8765/info return Sorry info feign

Start Service-hi, access Http://localhost:8765/info return Hello Eureka client 8762

Use of springcloud-----fuse Hystrix